Recent content by Porcelain

I'm still not getting it.

Homework Statement A 2100 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 20.0º with the horizontal. An average friction force of 4000 impedes the car's motion so that the car's speed at the bottom of the driveway is 3.8 m/s. What is the length of the...

a.) is km/h and b.) is km, i figured it out though.

Homework Statement Sally travels by care from on city to another. She drives for 30.0 min at 80.0 km/h, 12.0 min at 105 km/h, and 45.0 min at 40. km/h, and she spends 15.0 min eating lunch and buying gas. a.) Determine the average speed for the trip. b.) Determine the total disance traveled...

I have the answers, but I don't know how to get them. The starting graph is a position-time graph of a basketball being thrown straight up into the air. From that graph i have to find an acceleration-time graph, and a velocity-time graph. Can someone explain to me the acceleration-time...